I have attached the schematic for my smps, the schematic shows only one full half bridge but my layout for each half bridge is exactly like in the schematic only that both IR2110 are driven from a single power supply and from the same SG3525 chip. In other words the second half bridge i finished later works but the first one doesnt, and quite frankly because the first IR2110 is not driving the mosftets but its not dead or anything when i change the two IR2110 places they both work but only one at a time. Now heres the funny thing, when I made the first half bridge and put in the first IR2110 to drive the two mosfets of that half bridge it worked fine, now I installed the other two mosfets in the other half bridge which has a separate transformer, I inserted the second IR2110 which is also driven from the same SG3525 from which the first one gets its signal, but now when I attempt to drive both only one of them works, the other one doesnt work at all. Both IR2110 are driven from an SG3525AN oscillator. Hi, folks So I have two identical half bridge smps, each uses two mosfets and one IR2110 which drives the mosftets, both IR2110 are powered from a single small transformer and rectifier/voltage regulator.

Sg3525 ir2110 smps rar files